Tkactor drawn implement



Nov. 24, 1942. M; M. HoRNlsH Re., 22,225

y TRACTOR DRAWN IMPLEMEHT Original Filed Nav. 29, 1940 2 Smau-Sheet 2 Ressuecl Nov. 24, 1942,l

UNITED STATES` PATENT l OFFICE4 TRACTOR DRAWN lltIPLEMENT Mars M. Hamish, Washington, Ill., assigner to International Harvester Company, Chicago, Ill., a corporation oi' New Jersey original No. 2,263,089, dated Novemer'is, 1941,

Serial'No. 367,760, November 29, 1940.

Application for reissue May 27, 1942, Serial No. 444,720

Claims.

invention relates to the adjustment of a tractor drawn implement. More specically it relates to the adjustment of a, trail-behind implement such as a harrow by means of tractor power and to the automatic setting of the working position of the harrow.

ing a frame I5 and a pair of gangs I6, only one of which is shown, is connected to the tractor draw-bar I3 by means of a draft head I'I slid- It has been known to provide a narrow pulled behind a tractor with a fluid-power device actuated by the tractor for adjusting the gangs of the harrow. The application of such a fluidpower device to a harrow presents a special problem. 'I'he adjustment of the working position of a barrow also presents problems.

An object of the present invention is to provide an improved meansior adjusting by tractor power` a tractor-drawn implement.

A further object is the provision for means for adjusting a tractor-drawn barrow by means of tractor power.

A further object is the provision oi means for adjusting an implement, which means provides an automatic stop for the implement in working position and allows the irriplement to be set by .hand in any position intermediate working Aposition and transport position. y

According to the present invention, disk harrow is connected with the rear of a tractor and is adjusted by means of a huid-power de vice mounted on the narrow. A bar having ratchet teeth is slidably mounted on the 'frame of the harrow and connected with the harrow gang. A latch member is resiiientiy held out of engagement with the ratchet teeth, but may be actuated either by hand or by removal of the resilient means to engage any one of the ratchet teeth and thereby to limit the movement oi the narrow in working position; and,

Figure 3 fis a plan view of a portion of the,

harrow and the tractor draw-bar.

A tractor Ill has a body II, a rear axle I2, and -a draw-bar I3 connected to the rear axle ably mounted on the frame I5 and attached to the draw-bar by means of a bolt I8. -The narrow has two gangs i6, of which only one is shown, each gang being connected adjacent its outer end to the frame I5 as at I9. A link 20 connects the inner end of each gang and the lower end oi' a lever 2l pivotally mounted at a midpoint on a horizontal axis as at 22 on the frame i5. A link 23 connects the upper end of the lever 2| .and a bar 24 having ratchet teeth 25 and secured to the slidable draft head I'I. A pair or" bell cranks 26 is pivotally mounted on a common axis as at 2l on a pair of upstanding members 28 secured to the iront gang I5. The end of the bell cranks have vertical arms secured to one another and horizontal arms'vvhich are spaced and between which extends a pin 2u 'which is adapted to engage any oi the ratchet teeth 25,. but'is normally held out of engagement therewith by means of a spring 3@ which connests the vertical arms of the bell cranks 26 and one upstanding member 28. A stop member 3i is mounted on the 'bar 24 and is secured thereto by means of a bolt Ia passing through the stop member and any one of a plurality of holes 32 in the har. The stop member has a slot 33 and a portion 3l projecting above the bar', which in eiect, constitute a ratchet tooth positioned so as to engage the pin 29.

Figure l shows the barrow in transport posi tion. When it is desired to shift the harrow to working position, a forward pull on the narrow causes drag of the ground upon the gangs'to move the inner ends thereof rearwardly. As a result,7 the link 23 and bar 24 move rforwardly until the latch 29 engages the slot 33 in the stop member 3l as shown in Figure 2. Further movement lof the barrow gangs is prevented. The stop member 3l thus serves to predetermine the working position of the harrow gangs, and

its position along the bar 24 may be varied for against the spring 3B to bring the pin 29 into the engagement with a notch 25, or else, the spring 33 may be disconnected and the latch allowed to drop intothe path of thev ratchet teeth 25.

A iluld-power device 36 is mounted on up- 'bymeans of a structure I4. A barrow comprisa standing members 3l secured to the harrow to Lindgren- 2,156,570, andv comprises essentially a cylinder. 38, a piston 3l slldably mounted within the cylinder Il, and a rod III secured to the piston and extending from the cylinder 3l). The

' frame I5. 'I'his deviceisas shownin the patent means connecting the device and the tractor power plant.

3. A harrow comprising a frame part, a gang i v part movably connected therewith, an element rod extends through asleeve Il formed as an plings from which escapeof iluid is prevented when the conduits are disconnected. This means is more i'ully disclosed and claimed in applicants copending application, Serial Number 367.759, med November 29, 1946. when it is,

desired to shift the gang from working position to transport position, duid under pressure is supplied to the cylinder 38 to move the pistonA 39 rearwardly. The result is that the lever 2| is rotated clockwise and moves the link. and the inner ends of the narrow gangs ofthe harrow forwardly. During transport of the harrow the gangs are kept in transport position by means oi. continuously applied' pressurel against the piston 3i! or by engagement of the pin 29 with a latch tooth 25.

It will be apparent from the foregoing description that a new and novel construction has been provided by which the adjustment of an implement is eiected by means of a fluid-power device A mounted on the implement.v and vmeans are pro-k vided by which the implement is automatically limited in its movement to a predetermined working position and may be held manually to an intermediate position. The intention is to limit .the invention only within the Scope of the appended claims.

What isclaimed is:

l. In combination, va tractor having a power plant, a, harrow connected at the rear of the tractor and comprising a frame, a gang movably connected therewith, a lever pivoted kbetween its ends on a horizontal axis on the frame, means connecting the lower end of the lever and the gang, a member having ratchet teeth, means connecting the upper end ot the lever and the member, an element connected with the frame a nd engageable with the ratchet teeth, means holding the element out ot engagement with the ratchet teeth, an adjustable stop mounted on the member` having the ratchet teeth and engageable tractor power plant.v

2. In combination, a tractor having a power Plant, aharrow connected at the rear` of the tractor and comprising a frame, a gang movably connected therewith, a levermounted between its ends on a horizontal axis on the irame, means vconnecting the lower end of the lever and the gang, a member having ratchet teeth and mounted on the frame, an element connected with the frame and engageable with the ratchet' f teeth, means connecting the member and the upper end of the lever. a. fluid-power device mounted on the i'rame and connected with the lever at Y a point between itsupper end and the frame, and

connected with one part. a first means connected with the other part and having for a considerable amount of its length a. portion engageable with the element so as to prevent movement of the gang in the direction of its working position. means holding the element out of engagement with the portion and a second means mounted on the first means for adjustment along the length of the said portion on the first means and projecting therefrom so as to engage the element upon movement of the gang and thereby to limit the working position of the gang.

4. Aharrow adapted to be connected in trailbehind relation to a tractor and comprising a Vframe part, a gang part, a first means connected with one part and comprising a portion having a series of teeth, an element connected with the other part and being manually engageable with the teeth to hold the gang part against movein any of a number of positions between transment in the direction of a full working position in any of a number of positions between transport position and working position, stop means positioned for adjustment along the portion having teeth for `providing a variable 1imit,to the Ymovement of the gang part in the direction of full working position, and a duid-power device mounted on the harrow frame part and powered by the tractor for moving the gang part in th direction of transport position.

5. A harrow adapted to be connected in trailbehind relation to a tractor and comprising a trame part, a gang part, a iirst means connected with one'part and comprising a portion having a series oi teeth, an element connected with the 'other part and being manually engageable with the teeth to hold the gang part against movement in the direction oi a full working position` port position and working position, means positioned ior adjustment along the portion having teeth and adapted to cause holding between the;

element and the portion having teeth for providing a variable linut to the movement of the gang part in the direction of full working position, and a. iluid-power device mounted on the harrow frame part and powered by the tractor ior moving the gang part in the direction of transport position.

6. A barrow comprising a frame, a gang movably connected thereto, means for limiting the movement of the gang with respect to the frame inthe direction oi working position. said means comprising parts connected, respectively, to the frame and to the gang and comprising :Ntions mutually engageabie to prevent relative movement between the gang and the frame in a num-y ber of positions oi the sans with respect to the frame, means holding the portions out oi mutualengagement, and means acting against the aotion of the holding AIneens to eiect engagement' ,of the portions upon movement of the gang to a yfrom working position and preventing movement in the opposite direction.

8. An implement comprising a trame. an adiustable element movably connected thereto, and means for limiting the movementot the element with respect to the frame in the of working position, said means comprising parts connected, respectively, to the frame and to the element and comprising portions mutually engageable to prevent relative movement between th element and the iframe in a number o! positions of the element with respect to the frame. means holding the portions out oi' mutual engagement, and means acting against the action ci the holdingmeans to eiect engagement o! the portions upon movement of the element to a predetermined position with respect to thetrame in the direction of working position.

9. A harrow comprising a frame part, a gang part movably connected therewith, a member having a series o! notches and connected with one part, an element connected with the other part andengageable with any ofthe notches in the member to prevent relative movement between the parts, means preventing engagement oi the element with the notches, and means acting against the action of the last-mentioned means to cause engagement between the element and one of the notches in the member upon movement of the gang part to a certain position with respect to the barrow part.

10. A narrow comprising a frame part, a gang part movably connected therewith, a member connected with one part andhaving a series of ratchet teeth, an element connected with the other part and engageable with any of the ratchet teeth to prevent movement of the gang lpart with respect to the framepnrt in the direction of working position, resilient means holding the element and the ratchet teeth out of engagement, and means adjustably connected with the ymember having the ratchet teeth and engageable with the part connected to the element'ir causing lengagement of the element and the ratchet teeth against the action of the resilient 2 means.

Mans M. Honmsn. 

